Well, even though you have experience with nitrous, you still need to get more (experience, that is). As I previously advised, do it sporadically over the course of a week or two prior to your trip so it doesn't surprise and overwhelm you so much.
Do a ton of reading on nitrous itself (about both the facts and experiences), IN ADDITION TO reading about the combination. Bluelight, Erowid, Wikipedia are only but a few sources I'd recommend- at the very least. Try to check into others.
Speaking of Erowid, here's a report that you MUST read and give great consideration to:
https://erowid.org/experiences/exp.php?ID=79725
I think it is a very important piece to read for anyone considering this journey- especially in your case.
You MUST be fully prepared.
Please detail for us all of your trips and dosages for at least the last 2 weeks. Because, at this rate, what you have described makes me more inclined to advise at least 2 weeks minimum for your tolerance to baseline and your brain and body ready and okay to trip.
Normally, I'd say a week would suffice for tolerance purposes, I've found....but it greatly depends on how much you've consumed recently. Taking 11 hits in a week's time is rather excessive and likely would require more time.
Besides that, it goes back to your mental health. The human brain can only take so much in a period of time before it goes....it needs breaks, especially when you're consuming in such large quantities/frequencies.
I am glad we were able to get through to you OP. I hope you understand that we're not trying to come down on you and negatively criticize you or anything like that, we're genuinely only trying to help....this is a harm reduction centric community after all, and you're well on your way to seriously harming yourself- something which I can only hope we have averted here, and can continue to do for you.
But ultimately, unfortunately, we do not have the final say because we do not have any control whatsoever over what you personally choose to do....we can try to help you as much as we can, but only you have the real power to save yourself from harm or death. It is in YOUR hands.
I hope you keep in mind the famous words from Uncle Ben....."with great power, comes great responsibility" lol a little light humor, but it actually is true and even applies here! We will guide you all we can, but it's up to you to do the right thing for yourself.
Be safe. Be responsible. Use responsibly, and in moderation. Give the substances you consume the respect that they not only deserve, but COMMAND.
-PA